Arc-light



J. J. HARMER.

ARC LIGHT. APPLICATION FILED 1AN.Y7.1920.

1,392,497. v mm oct. 4, 1921.

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JOSEPH JUSTICE BARMER, OF NEW YORK, N. Y.

Anc-LIGHT.

Speesieationl of Letters Patent.

Application led January 7, 1920. Serial No. 349,941.

To all whom t may concern Be it knownthat I, JOSEPH JUSTICE HARMER. acitizen of the United States, and resident of the city of New York, inthe county of New York and State'of New York, have invented certain newand useful Improvements in YArc-Lights, ofV which the following is aspecification.

The invention relates to improvements in arc lights with features havingparticular utility for functioning in connection with lighting inphotographic work and stage illumination.

Heretofore lights have been used employing means fo-r centralizing therays or beams upon objects and it has been found difficult to direct thelight to keep the object within the shaft of the spot'rays, and it isthe object of this invention to overcome these and numerous otherdefects in are lighting for photogravure.

One object of the invention is the providing of an arc light providedwith adjustable electrodes associated with a parabolical reflector diskfor intensifying the light rays, and a rotary lens comprised ofsectionalized series of colored glass plates converging at or near theircenters into an aperture of any size through which the white spot raysare projected and directed upon a predetermined object.

Another object of the invention is the pro-l viding of a rotary lenswith spot light or beam aperture that may be rotated at. any speed byany suitable means giving the result of a vari-colored ground (eitherstationary in varying colored ground or active) thusly providing a highpowered lamp for photographic use sfuch as' motion picture work, whereinthe light itself directs and controls the position of the objectmaintaining such object properly, within the strong spot rays andsimultaneouslyl projecting a multi-colored setting or groundv forproducing the desired enframing effect.

Another and further object of the invention is in the use of the arelight for theatrical and stage illuminating purposes since itaccomplishes a greatly required need in providing a light having ananimated field of vari-colored grounds and a continuously projected spotor light shaft for maintaining the vpropery position of the objects onwhich its rays are cast or projected, and

also its rays and effects may be controlled eitherv by hand orautomatically.

In the following is described in connection -with the accompanyingdrawings, one embodiment of the invention the particular featuresthereof being more particularly defined hereinafter in the claims.

In the drawings Figure 1 is a face elevation of the lamp illustratingthe position of the sectionalized series of plates in the lens thecentralized spot light aperture together with means attached to a motorfor revolvino' at any desired speed the entire face of t e apparatus.Fig. 2 is a horizontal sectional view on line 2-2 of Fig. 1 of part ofthe rotatable lens and means for actuating such rotation; and Fig-8 is alongitudinal sectional view of the lamp showing the relative positionsof the electrodes, reflectors and lens.A

Similar numerals of reference indicate similar parts throughout theseveral views.

In the drawin s 1 designates the cylindrical casing or ousing of thelamp provided with ventilator 2 and base 3, having adjustably mountedtherein supporting standards 4 arranged for juxtapositlon withrelationto the reflector and carrying at the upper ends thereof positiveelectrode 5 and negative electrode 6.

aid casing has mounted therein at its rear end a shell casing 7- havingsuitably fastened therein a parabolical reflector or mirror 8 fordeflecting and intensifying the white rays or spot beam of lightprojectedV through the lens body.

The front edge of the cylindrical casing 1 has fastened thereto acircular channel 9 and the rim 10 of lens 11 is also grooved orchanneled to receive therebetween a series of ball bearings 12,sofarranged as to provide easy rotative movement of the lens structure.Rim 10 has mounted therein disks of any desired number of segmentalglass plates 13 of varied colors (such as green, blue, red, violet,yellow and multi-colored for effecting a suitable ground) said plates 13thereof converging at their centers and forming thereat an aperture 14for the projection therethrough of the white spot light and beam and byreason of such locations of said aperture in lens 11 provide a shaft' oflight in which an object to be photographed is at all times held intoproper radius, per- Patentea oct. 4, 1921.

mitting the operators of motion picture atpparatus to directhisphoto-projections properly and successfully, 'and necessarily obviatethe injury or spoiling of expensive lms and plates.

Rim 10 has mounted thereon a circular rack l5 the teeth of Which arearranged to engage or mesh With suitable gear 16 mounted on shaft 17 oirotary motor 18 driven from any suitable source, the object of whichtensifying deflector mounted therein, elec-v trodes mounted in saidcasing and adjustable with relation to said defiector, a rotatable lensmounted in said casing, multi-colored plates in said lens, aspot lightaperture formed at the centralized juncture of said plates, and meansfor rotating said lens.

2. A device 'of the character described comprising a. supportinghousing, a parabolica] light intensifying deector mounted in saidhousing a support carrying arc electrodes adjusta le in said housingwith relation to said deflector, a rotatable lens casing mounted in thefront of said housing, bearings for said lens casing, a series ofvaricolored lens plates mounted in said lens casing, a spot or beamlight aperture formed at the central juncture of said plates inalinement with the deflected light rays of said arc, and means forrotating said lens casing to cause a vari-colored field and a projectedshaft of spot light.

3. A device of the character described comprising a supporting casing,light ray deflector means mounted therein, arc light generating meansassociated therewith, a rotatable lens mounted in said casing, a lightray aperture formed in said lens arranged to direct a shaft of spotlight upon an object and to project a field of colored light around saidspot lightto cause a setting for stage and theatrical illumination.

4. A device of the character described including an arc light for stageand display illumination comprising a supporting casing, a lightintensifying delector, arc light generating means, a rotatable lensmounted therein, a spot light aperture formed at the central bodyportion of said lens, and means arranged to rotate said lens at diversespeeds. l

Signed at the city of New York in the county of New York and State ofNew York this 22nd day of December A. D. 1919.

J. JUSTICE HARMER.

